A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...
Light is a type of energy which is emitted from light sources. Light sources can either be natural, such as the Sun, or human-made, such as a light bulb. Light travels in straight lines and is the ...
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